-LRB- CNN -RRB- -- Facebook CEO Mark Zuckerberg just had a birthday on May 14 . He 's now 29 . If that seems insanely young for a billionaire , remember that he co-founded Facebook when he was a teenager .

Zuckerberg has a lot to celebrate . He 's amassed a fortune , inspired one of every seven people on the planet to use his product and changed how the world communicates -- all before age 30 .

By comparison , when they were 29 , Steve Jobs launched the Macintosh computer and Bill Gates was readying the first retail version of Microsoft Windows . And most of the rest of us were just struggling to pay the rent .

So happy birthday to Zuck ! To mark the occasion , we collected these 10 random facts about the tech wunderkind :

1 . Zuckerberg suffers from red-green colorblindness and sees the color blue best , which is why blue dominates Facebook 's color scheme .

2 . AOL and Microsoft tried to recruit him when he was in high school after he created Synapse , a program that used artificial intelligence to learn users ' music-listening habits .

3 . He wears the same gray Facebook T-shirt almost every day because he 's busy and it saves him time in the morning .

4 . Despite Zuckerberg 's casual wardrobe , he said he wore a tie every day in 2009 to show that Facebook was serious about growing in the face of the global recession .

5 . He is a vegetarian and once said he will only eat meat if he has killed the animal himself . But among his `` likes '' on his Facebook page are McDonald 's and In-N-Out Burger .

6 . He has amassed 220,000 Twitter followers despite the fact that he 's only tweeted 19 times in four years , and not once in 15 months .

7 . In October 2010 , Zuckerberg took a bunch of Facebook staffers to a public theater to see `` The Social Network , '' the movie about the founding of Facebook . In public comments afterward , he criticized the film 's portrayal of him as someone who invented Facebook to gain social status .

8 . He owns a Hungarian sheepdog named Beast , who has a Facebook page with 1.5 million fans .

9 . He took some heat last year for giving his wife , Priscilla Chan , a ruby wedding ring that jewelers valued at about $ 25,000 even though he was worth about $ 19 billion at the time .

10 . If you type @ -LSB- 4:0 -RSB- in a Facebook comment window and hit enter , his name will appear .

What , if anything , fascinates you about Zuckerberg ? Let us know in the comments .

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Facebook co-founder and CEO Mark Zuckerberg turned 29 on May 14

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Young billionaire has inspired one of every seven people on the planet to use his product

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Zuckerberg trivia : Facebook is mostly blue because he is colorblind